Rattlesnake Ridge (sometimes called Rattlesnake Ledge or Rattlesnake Mountain) is a mountain ridge located south of North Bend, Washington, United States. The western end is near the intersection of State Route 18 and I-90 in Snoqualmie, Washington and runs southeast about 7 miles (11 km) or 11 miles (18 km) by trail. It is the highest and easternmost of the Issaquah Alps (although Cedar Butte in the gap between Rattlesnake Ledge and the Cascade front at Mount Washington is considered by Harvey Manning to be a quasi-Alp). A complicated maze of abandoned logging roads and constructed trails have been strung together to provide a 10.5-mile (16.9 km) foot path from the Snoqualmie Point Trailhead at Exit 27 on I-90 all the way to the Rattlesnake Lake trailhead near Exit 32.

Most of the mountain is owned by the state of Washington or King County, and is protected as Rattlesnake Mountain Scenic Area, managed jointly by Washington State Department of Natural Resources and King County Park and Recreation Department. The Southern section of the mountain, closed to public, is owned by Seattle Water Department, while large sections in the western part of the ridge are owned by Weyerhaeuser Corporation, which conducts substantial logging operations there.[3]

On May 30, 2009, a 28 year old man fell one hundred feet to his death from a ledge on Rattlesnake Ridge. Officials say Ruben Maldonado, 28, of Snohomish County, fell from the popular hiking area above Rattlesnake Lake about 12:15 p.m..[4][5]

On March 9, 2012, a 32-year old man fell about 300 feet from a ridge. He was found dead by another hiker who saw the fall.[6][7]

On February 9, 2013, a Redmond man missing near Rattlesnake Ridge was found dead at about 10 a.m. Bove said King County Search and Rescue found the body of Ira Thomas Clodfelter, 28, about three-quarters of a mile from the main trail, and it appeared to be a suicide. The King County Medical Examiner said Feb. 11 that Clodfelter died from a gunshot wound to the head, and ruled it a suicide. [8]

On August 29, 2013, a man in his 20's fell to his death Thursday while hiking in the Rattlesnake Ridge area of Snoqualmie near Rattlesnake Lake. King County Sheriff s deputies received a 911 call around 10:55 a.m. from a woman who said someone had fallen off Rattlesnake Ridge. When rescue personnel arrived, a friend of the victim told them she and the man had hiked to the top of the ridge. She was taking pictures of the man, who was near the ledge, when he slipped and fell as he was trying to jump to a rock. Medics found the man's body and determined he had fallen about 150 feet to his death. [9]